和訳お願いします。
私たちというのは出向者を受け入れる取引先です。A社は私の勤務先です。
HMRCは税務署、PAYEは源泉のことです。
for HMRC reporting の部分の訳が？です。

We have looked into the tax liabilities and from this perspective,
it would be preferable for him to be paid through our payroll in the UK so that he can be taxed correctly for HMRC reporting
and then for A company to reimburse half to us. Alternatively,
A company will have to provide us with the total amounts he is paid each month for us to then apply this through PAYE so this is taxed accordingly,
which would be rather complex.